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Project:Passive cooled pc: Difference between revisions

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Project:Passive cooled pc (view source)

Revision as of 14:14, 29 March 2012

355 bytes removed ,  29 March 2012
m
Undo revision 22015 by Daveb - found topic in mailing list, so put project back as found:)
m (some maths advice)
m (Undo revision 22015 by Daveb - found topic in mailing list, so put project back as found:))
Line 50: Line 50:
|CPU fan:
|CPU fan:
|5 dB
|5 dB
|}


'dB' is an exponential scale, so you need to convert the dB values to a linear energy scale before you can add or subtract them..
In a spreadsheet, if the dB value is in cell B2, '=EXP(B2/10*LN(10))' is the sound energy.
The dB value from a sound energy in C8 is '=LOG(C8)*10'.
{|
|PSU Fan: 34dB
|-
|HDDs: 44dB
|-
|GPU fan: 55dB
|-
|CPU fan: 40dB
|}


For reference:  
For reference:  
Daveb
153

edits

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